Find sum of elements in a cell along the columns

Hi all,

I have a 3D cell A with dimensions 3x5x2. An example of elements along row 2, all columns and z dimension = 1 is:

x = A(2,:,1)

x = [ ] [ ] 5.1 [ ] 7.9

I would like to add up the non zero entries and get the number of non zero entries in this resulting array. I tried using:

y = sum([A(2,:,1)])

and

y = cumsum([A(2,:,1)])

But got the following error:

"Error using sum

Invalid data type. First argument must be numeric or logical."

Could anyone please help me with this and would kindly let me know the procedure to solve such problems.

[Fabio Freschi]

Could you please load your data in a mat file?

Answer 1

[James Tursa]

Is this what you are trying to do? (using the curly braces)

y = sum([A{2,:,1}])

[Vishakha Ramani]

Thank you. Can't believe this was that simple. Also, could you please tell me how would you find the number of non-zero entries in such a case?

Answer 2

[Jacob Shulman]

A=cell(2,2,2)
A{2,1,1}=1;
A{2,2,1}=2;
B=0;
[rows,columns,depth]=size(A);
for i=1:rows
    for j=1:columns
        if nonzeros(A{i,j,1})
            B=B+1;
        end
    end
end
 y = sum([A{2,:,1}])
 B

The function nonzeros will not count zeros or blanks.